<template>
  <div class="login-container">
    <div class="login-box">
      <!-- 头像区域 -->
      <div class="avatar-box">
        <img src="../assets/logo.png" alt />
      </div>
      <!-- 登录表单区域 -->
      <el-form ref="loginFormRef" :model="loginForm" :rules="loginFormRules" class="login-form">
        <!-- 账号 -->
        <el-form-item prop="username">
          <el-input v-model="loginForm.username" prefix-icon="iconfont icon-user"></el-input>
        </el-form-item>
        <!-- 密码 -->
        <el-form-item prop="password">
          <el-input
            v-model="loginForm.password"
            prefix-icon="iconfont icon-3702mima"
            type="password"
          ></el-input>
        </el-form-item>
        <!-- 按钮 -->
        <el-form-item class="btns">
          <el-button type="primary" @click="login">登录</el-button>
          <el-button type="info" @click="reset">重置</el-button>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>

<script>
export default {
  data() {
    return {
      // 这里是登录表单数据绑定对象
      loginForm: {
        username: 'admin',
        password: '123456'
      },
      // 这里是验证表单规则
      loginFormRules: {
        username: [
          { required: true, message: '请输入用户名', trigger: 'blur' }
        ],
        password: [
          { required: true, message: '请输入密码', trigger: 'blur' },
          { min: 6, max: 15, message: '长度在 6 到 15 个字符', trigger: 'blur' }
        ]
      }
    }
  },
  created() {},
  methods: {
    // 点击重置，重置表单数据
    reset() {
      this.$refs.loginFormRef.resetFields()
    },
    // 点击登录
    login() {
      // 表单预验证，valid=true-->通过，valid=false-->不通过
      this.$refs.loginFormRef.validate(async valid => {
        if (!valid) return
        const { data: res } = await this.$http.post('/v1/login', this.loginForm)
        if (res.meta.status !== 200) return this.$message.error('登录失败')
        this.$message.success('登录成功')
        // 1. 将登录成功之后的token,保存到客户端的sessionStorage
        //  1.1 项目中除了登录之外的其他api接口，必须在登录之后才能访问
        //  1.2 token只应在当前网站打开期间生效，所以将token保存在sessionStorage中
        window.sessionStorage.setItem('token', res.data.token)
        // 2. 通过编程式导航跳转到后台主页，路由地址是 /home
        this.$router.push('/home')
      })
    }
  }
}
</script>

<style lang="less" scoped>
.login-container {
  height: 100%;
  background-color: #2b4b6b;
  background: url('../assets/loginBg.jpg') top center no-repeat;
  background-size: 100% auto;
}

.login-box {
  width: 450px;
  height: 300px;
  border-radius: 3px;
  background-color: rgba(255, 255, 255, 0.9);
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
}

.avatar-box {
  width: 130px;
  height: 130px;
  border: 1px solid #eeeeee;
  border-radius: 50%;
  padding: 6px;
  position: absolute;
  left: 50%;
  transform: translate(-50%, -50%);
  background-color: #ffffff;
  box-shadow: 0 0 10px #dddddd;

  img {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    background-color: #eeeeee;
  }
}

.login-form {
  position: absolute;
  bottom: 0;
  width: 100%;
  padding: 0 20px;
  box-sizing: border-box;

  .btns {
    display: flex;
    justify-content: flex-end;
  }
}
</style>
